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1 results

  • Influence of Density on Johnsongrass (Sorghum halepense) Interference in Field Corn (Zea mays)

  • Hani Z. Ghosheh, David L. Holshouser, James M. Chandler
  • Journal:
    Weed Science / Volume 44 / Issue 4 / December 1996
    Published online by Cambridge University Press:
    12 June 2017, pp. 879-883

  • Experiments were conducted from 1990 to 1994 to investigate the density-dependent effects of rhizome and seedling johnsongrass on the magnitude of full-season interference in field corn. Corn grain yield was decreased as rhizome johnsongrass density increased. A maximum density of 3 rhizome johnsongrass plants 9.8 m−1 of row was considered critical to avoid yield losses above 5% of full-season weed-free corn. Interference of johnsongrass plants originating from seed and growing at densities up to 128 plants 9.8 m−1 of row did not affect grain yield. Seedling johnsongrass plants growing at a constant density of 9.8 plants m−1 of row did not affect yield from corn planted at five densities.